Rear bumper for an automobile



FIG. 1 is a perspective view of a first embodiment of a rear bumper for an automobile showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a perspective view of a second embodiment of a rear bumper for an automobile showing our new design;

FIG. 8 is a front elevation view thereof;

FIG. 9 is a top plan view thereof;

FIG. 10 is a bottom plan view thereof;

FIG. 11 is a left side elevation view thereof; and,

FIG. 12 is a right side elevation thereof. 

CLAIM The ornamental design for a rear bumper for an automobile, as shown and described. 